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Effect of fabrication parameters on the microstructure,in-plane anisotropy and magnetostriction of Fe-Ga thin films

Rare Metals 2010年第6期29卷 583-588页

作者： WANG Bowen HUANG Wemnei CAO Shuying DU Yong HE Yuehui HUANG Baiyun Province-Ministry Joint Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability Hebei University of TechnologyTianjin 300130China International Center for Materials Physics Chinese Academy of SciencesShenyang 110015China State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083China

The microstructure,in-plane anisotropy,and magnetic properties of Fe-Ga thin films were investigated by X-ray diffraction analysis,vibrating sample magnetometer,and capacitive cantilever *** in-plane induced anisotropy is well formed by the applied magnetic field during sputtering,and the anisotropy field Hk decreases with the sputtering power *** coercivity of Fe-Ga thin films decreases with increasing power when the sputtering power is less than 60 W and increases when the power is larger than 60 *** magnetostriction of the thin films reaches 66 × 10-6 at the sputtering power of 60 *** Fe-Ga films,which exhibit good field sensitivity,low coercivity and high magnetostriction,have been fabricated at the power of 60 W,and they can be used as the materials of magnetostrictive transducers.

关键词： metallic thin films magnetostriction magnetron sputtering anisotropy

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Microwave magnetic properties of soft magnetic thin films

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Science China(Physics,Mechanics & Astronomy) 2011年第7期54卷 1200-1207页

作者： CHAI GuoZhi GUO DangWei FAN XiaoLong XUE DeSheng Key Lab for Magnetism and Magnetic Materials of the Ministry of Education Lanzhou University Lanzhou 730000 China

We review our works that focus on the microwave magnetic properties of metallic, ferrite and granular thin films. Soft magnetic material with large permeability and low energy loss in the GHz range is a challenge for the inforcom technologies. GHz magnetic properties of the soft magnetic thin films with in-plane anisotropy were investigated. It is found that several hundreds of permeability at the GHz frequency was achieved for Col00_xZrx and Co90Nbl0 metallic thin films because of their high satu- ration magnetization, and an adjustable resonance frequency from 1.3 to 4.9 GHz was obtained. Compared with the metallic thin films, the weaker saturation magnetization of Ni-Zn ferrite thin films results in several tens of permeability at the GHz frequency, but the larger resistivity of the ferrite prepared in situ without any heating treatments has lower energy loss. In order to obtain materials with large permeability and low energy loss in the GHz range, the [CoFe-NiZn ferrite] composite granular thin films were investigated, where the advantage of higher saturation magnetization for the metallic alloy and the high resis- tivity as well as high saturation magnetization for the ferrite results in a good GHz magnetic performance.

关键词： microwave magnetic properties metallic thin films ferrite thin films granular thin films in-plane uniaxial anisotropy

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